If you can go back in time how much time will you go back and why??

Personally, I wanna go 5 years back and correct mistakes I regret like ruining lots of friendship I had , apologize for a certain someone ,I also wanna spend time with my grandpa cuz ever since he died I regret not talking to him more, I wanna give studying an actual effort so I don't worry my parents about bills. I wanna fix a lot of things honestly..

I wanna be a better person •︿•